That's been my assumption. Having almost complete ignorance of any fossil evidence, I figured that the two groups represented diverging modifications of some sort of precursor. Turning into is far too weird.Phil said:Perhaps we are looking at a scenario that the ancient Orders of nautiloids, of which the modern Order Nautilida is the only survivor, were a disparate group with many varied forms of soft-bodied morphologies. The modern coleoids may have developed from a long extinct branch of nautiloid with more modern and familiar features, possibly varying greatly in form from today’s Nautilus.
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